Guying rings for attaching guywires to various masts
38mm version made for standard metal mast pipes. Can be printed a few percent smaller to fit only at the joint between two sections, or held in place by hoseclamp or duct tape.
12mm and 20mm version for Sotabeams Carbon 6 mast. Holes designed to either accomodate paracord, or smaller carabiners. Tested with NiteIze S-biners.
Made with 38mm, 20mm and 12mm center holes, but custom makes are welcome.
The author hasn't provided the model origin yet.